The disgruntlement of the staff at Safeway at the way they are treated is almost always visible.

FORBES: Whole Foods And The Triumph Of Customer Capitalism

It's the same pride that is always so visible with the U.S. Marines.

CNN: Secret Service still the best and the brightest

This waste produces pollution on land, sea and air and is not always visible - it needs to be reduced not just PICKED UP.

BBC: Overflowing bin

Eating and drinking at these places is an inimitable glimpse at a side of Hong Kong life that isn't always plainly visible but is a crucial part of residents' after-hours social lives.

BBC: Hong Kong��s secret nightlife spots

The scars of those experiences are not always visible, but it is a legacy that may be harder for many to deal with once they are out in the civilian world, where friends and colleagues have not shared similar experiences.

BBC: Helping ex-soldiers find a place 'in the real world'